CVE-2025-59284

Windows NTLM Spoofing Vulnerability

CVE-2025-59284 is fixed in 10 products on 1 platform, first by KB5066793, released October 14, 2025. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

3.3

Important

Exploitation

None reported

Exploitation Less Likely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0103

63rd percentile

<p>Exposure of sensitive information to an unauthorized actor in Windows NTLM allows an unauthorized attacker to perform spoofing locally.</p>

Where it's fixed

Product	Fix	Released
Microsoft
Windows 11 Version 22H2 for ARM64-based Systems	KB5066793	Oct 14, 2025
Windows 11 Version 22H2 for x64-based Systems	KB5066793	Oct 14, 2025
Windows 11 Version 23H2 for ARM64-based Systems	KB5066793	Oct 14, 2025
Windows 11 Version 23H2 for x64-based Systems	KB5066793	Oct 14, 2025
Windows 11 Version 24H2 for ARM64-based Systems	KB5066835	Oct 14, 2025
Windows 11 Version 24H2 for x64-based Systems	KB5066835	Oct 14, 2025
Windows 11 Version 25H2 for ARM64-based Systems	KB5066835	Oct 14, 2025
Windows 11 Version 25H2 for x64-based Systems	KB5066835	Oct 14, 2025
Windows Server 2025	KB5066835	Oct 14, 2025
Windows Server 2025 (Server Core installation)	KB5066835	Oct 14, 2025

Details

Published
October 14, 2025
Weakness
Exposure of Sensitive Information to an Unauthorized Actor
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59284

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